Wheel-cutting fixture for watchmakersj lathes



(No Model.) H. K. KEBABIAN. v

WHEEL CUTTING FIXTURE FOR WATUHMAKERS LATHES.

No. 512,550. Patented Jan. 9, 1894.

H My 1 will UNITE STATES PATENT OFFICE.

IIRANT K. KEBABIAN, OF PHILADELPHIA, PENNSYLVANIA.

WHEEL-CUTTING FIXTUYRE FOR WATC'HMAKERS LATHES.

SPECIFICATION forming part of Letters Patent No. 5l2, 550,dated January 9, 1894. Application filed March 15, 1893. Serial No. 466,011. (No model.)

To all whom it may concern.-

Be it known that I, HRANT K. KEBABIAN, of Philadelphia,in the county of Philadelphia and State of Pennsylvania, have invented a new Improvement in Wheel-Cutting Fixtures for \Vatchmakers Lathes; and I do hereby declare the following, when taken in connection with accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in

Figure l, a plan View showing the application of my improved fixture to an ordinary watch-makers lathe, only a portion of which is represented; Fig. 2, a detached View of the device in side elevation; Fig. 3, a reverse plan view of the device; Fig. 4, a similar View with the lower base-piece removed; Fig. 5, a view of the device in vertical transverse section on the line w-x of Fig. 2; Fig. 6, a detached plan View of the anvil; Fig. 7, a sectional view of the cutter; Fig. 8, a detached view of the milled disk thereof, and Fig. 9, a similar view of the guide thereof.

My invention relates to wheel-cutting fix tures for watch-makers lathes, the object being to produce a simple, compact, comparatively inexpensive device, composed of few parts, adjustable for the reception of watch- Wheels of all ordinary sizes, and adapted to do accurate work with the minimum expenditure of time and labor.

. With these ends in View, my invention consists in awheel-cutting fixture having certain details of construction and combinations of parts as will be hereinafter described and pointed out in the claims. I

Myimproved device com prisesalower basepiece A, and an upper base-piece B, the former being adapted to be removably secured to an ordinarylathe-rest, and the latterbeing longitudinally movable on the former. The said base-plate A,has a large shallow, rectangular recess A, formed in its lower face, and conforming in dimensions to those of the rest of an ordinarywatch-makers lathe of standard size, the said recess opening through the inner end of the base-piece to adapt the same to be readily slipped over the rest, upon which it is thenconfined to longitudinal movement inward and outward, being held against lateral displacement thereupon. Acentral lon gitudinal slot A formed in the said lower base-piece and opening through theinner end thereof, is designed to receive the ordinary stud or T-head, which forms a part of alatherest, and which holds the said base-piece, and hence the fixture, down upon the same.

In Fig. 5 of the drawings I have shown, in transverse section, a lathe-rest 0, having a stud or T-head 0', both of ordinary construction, and as heretofore mentioned. The said lower piece is provided upon its upper face, and directlyin the rear of the said slot A with a block D, which may be formed independent of and attached to it by screws d, as shown, or which may be formed integral with it,if preferred. The said block is adapted at its outer end to receive a horizontal adjusting-screw D, mounted in a flange B depending from the outer end of the upper base-piece B, and furnished at its projecting outer end with a knurled thumb-nut D which is rotated to move the said upper base-piece inward and outward ,over the lower. basepiece with which it is connected by means of the said block. To receive the said block, which has beveled edges, the upper base-piece is provided upon its lower face with an under-cut longitudinal rib E, and an under-cut longitudinal bar E, of which the former is made integral with or fixed to the said basepiece, and the latter, whichis the narrower of the two, adapted to be moved laterally or sidewise for taking up wear, by means of two adjusting-screws E E impinging against its outer edge-,and mounted in a narrow rib depending from the adjacent edge of the upper base-piece, to which the said movable rib is attached by means of screws e e, passing through laterally elongated screw-holes c 6, formed therein. The block is made slightly thicker than the space between the rib E and bar E is deep, so that they do not rest upon the upper surface of the lower base-piece, a slight space (1 being formed between the two base-pieces, as shown in Fig. 2 of the drawings. The forward end of the block is constructed witha long clearance-slot d, corresponding to the slot A in the lower basepiece, and provided to clear the stud C, by means of which the fixture is secured to the lathe-rest C, as already set forth. The upper base-piece B, I provide with a table F, and an upright F. The upper end of the said upright is bent forward, and furnished with a vertical sleeve F ,the' bore of which is located directly over a socket G, formed in the said table, which, with the said upright, is located in the longitudinal center of the upper faceof the said base-piece. The said table and upright are preferably formed in one piece, and secured to the upper base-piece, but if desired, they may be formed independently, and secured thereto, or they may be made integral therewith. The sleeve F before mentioned, receives the upper centering-pin H, which is held in place by means of a clamping-screw H, while the socket G, in the table F, receives a'short lower centering-pin H which is secured in the right vertical adjustment by a clamping-screw Hiarranged horizontally in the table, and extending over the upper base-piece, as shown in Fig. 5 of the drawings. Inasmuch as the socket G, is comparatively short, I virtually extend it so as to form a longer bearing for the pin 11 by means of a bearing-sleeve I, extending upward from the face of the table, as shown in said Fig. 5 of the drawings, and in order to facilitate getting hold of the said pin for removing it, I provide the table with a lifting device, consisting of a finger-piece J,"a short vertically movable shaft J mounted in the table, and having the said finger-piece attached to it, and a horizontal lifting-pin J extending inward from the lower end of the said shaft, through a vertical slot J formed in the table, and under the pin H the said lifting device comprisingthe parts mentioned, being located on the opposite side of the table from the clamping-screw H It will be readily understood that by loosening the setscrew and relieving the pin, the same may be readily lifted, so that it can be grasped by the fingers for removal from the' fixture, by lifting on the finger-piece J. I do not limit myself to the use of this lifting device, but I prefer to use it on account of its convenience. In order to get a sufliciently long bearing for the short centering pin, I prefer not to have its upper end project far enough above the bearing-sleeve to permit it to be grasped for removal, and hence my preferred use of a lifting device. I-Ieretofore the lower centering-pin has been made much longer, and arranged to extend below its bearing for a sufficient distance to be grasped and manipulated from its projecting lower end, but my device compels the use of a short centering pin, for a long centering-pin would interfere with its application toa lathe-rest. An anvil K, supported upon the said table, forms a rest for the wheels while they are being operated upon. The said anvil is oblong in general form, its inner end being rounded, and its outer end being squared, and its center constructed with an elongated slot K ,through which the lower centering-pin H passes, and the lower portion of the said slot being ofiset as at K K for the reception of the bearingsleeve I, which assists in holding the said anvil in place. The rear end of the anvil is furnished with a central horizontal threaded socketk, which receives an adj listing-screw L, mounted ina horizontal position in the upright F. The said screw is provided for adjusting the anvil inward or outward, independently of either base-piece, according to the size of the wheel to be cut, the elongated form of the slot K before mentioned, permitting such adjustment in which the anvil is guided by dove-tails is entering recesses in its lower edge, and located upon the upper face of the table on opposite sides of the socket G, therein, and extending parallel with the length thereof. The extreme inner edge of the anvil is slightly cut away, as at W, as shown in Fig. 6 of the drawings, to receive the cutter, in operating upon very small wheels.

My improved fixture is applicable to use with watch-makers lathes of ordinary construction, and not necessary to be described herein. In Fig. 1 of the drawings the bed M and cone M of such a lathe are shown. The cutter employed with my improved fixture comprisesa milled diskN (Fig. 8 and a guide N (Fig. 9) and two disks P P, Fig. 7) of ordinary construction and arrangement. The said parts are mounted, when used with my fixture, upon an arbor-like chuck Q, the outer end whereof is thereto provided with a reduced stem Q, which is threaded to receive a centrally perforated internally threaded clamping-nut Q which is screwed up against the disk P for binding the disk N and the guide N betweenit and the other disk P, which is rigidly secured to the chuck, or may be made integral therewith. The inner end of the chuck is threaded to adapt it to be secured to the lathe-head M and has an enlarged beveled portion which centers it therein.

It will be understood that my improved fixture is to be used with an ordinary watchmakers lathe, as one of the several fixtures thereof. As thus viewed it forms a very simple and comparatively inexpensive substitute for the complicated machine which has heretofore been required for cutting watchwheels.

In using the fixture it is applied to the rest of the lathe, and its anvil adjusted inward or outward according to the size of the wheel to be trimmed. For a large wheel the anvil will be moved well inward so as to give a wide bearing for the wheel to rest upon between its inner edge and 'the axis of the two centering pins; on the other hand, if the wheel is small, the anvil is moved outward so as to reduce this space, and let the cutter cut up to its edge.

In my improved anvil there is suflicient range of adjustment to accommodate the fixture to watch-wheels of all ordinary sizes, whereby I avoid the use of a set of rests for different sized wheels.

My improved fixture, as will be observed,

is comparatively simple in construction, is very convenient to use as both hands of the operator are left free, and capable of being adjusted to take in all ordinary wheels.

I would have it understood that I do not limit myself to the exact construction herein shown and described, but hold myself at liberty to make such changes and alterations as fairly fall within the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is'

1. In a wheel-cutting fixture for watch-makers lathes, the combination with an upper and a lower base-piece, the latter being adapted to fit over and be secured to a lathe-rest, and the former being movably mounted upon and directly over the latter, of means for adj usting the said upper base piece upon the said lower base-piece, an upper and a lower centering-pin carried by the upper base-piece and located one above the other in the same vertical plane, and the lower pin being a short pin, and terminating at its lower end above the lower base-piece, and always clearing the same, an adjustable anvil for supporting the work between the pins, mounted upon the said upper base-piece, and means for adjusting the anvil back and forth in a horizontal plane, substantially as described.

2. In a wheel-cutting fixture for watch-makers lathes the combination with an upper and a lower base-piece, the latter being adapted to be attached to a lathe-rest, and the former being movably mounted upon and directly.

over the latter, of means for adjusting the said upper base-piece on the said lower basepiece, a table located upon the upper basepiece and containing a vertical socket, an upright also located upon the upper base-piece, and furnished with a sleeve extending over the said socket, a centering-pin mounted in the said sleeve, a short centering pin located in the said socket, an anvil supported upon the said table, and constructed to fit over the said short centering-pin, a lifting-device mounted in the upper base-piece for lifting the saidshort pin, and means for adjusting the anvil back and forth in a horizontal plane, substantially as described.-

3. I11 a wheel-cutting fixture for watch-makers lathes, the combination with an upper and a lower base-piece, the latter being adapted to be attached to alathe-rest, and the former being movably mounted upon the latter, of means for adjusting the said upper base-piece on the said lower base-piece, a table located upon the upper base-piece, and containing a vertical socket, an upright also located upon the upper base-piece and furnished with a sleeve extending over the said socket, a centering-pin mounted in the said sleeve, a short centering-pin located in the said socket, an anvil supported upon the said table and constructed with an elongated slot adapting it to fit over the said short centering-pin, and

means for adjusting the anvil inward and outward, substantially as described.

t. In a wheel-cutting fixture for watch-makers lathes, the combination with an upperand a lower base-piece, the latter being adapted to be attached to a lathe, and the former being movably mounted upon the latter, of means for adjusting the said upper base-piece on the said lower base-piece, a table located upon the upper base-piece, containing a vertical socket, and having a bearing sleeve forming an upward continuation thereof, an upright also located upon the upper basepiece, and furnished with a bearing-sleeve extending over the said socket, a centeringpin mounted in the said sleeve, a short centering -pin located in the said socket, and bearing-sleeve, and an anvil supported upon the said table, and constructed to fit over the said short centering-pin and bearing-sleeve, substantially as described.

5. In a wheel-cutting fixture for watch-makers lathes, the combination with an upper and a lower base-piece, the latter being adapted to be attached to a lathe-rest and the former being movably mounted upon the latter, of means for adjusting the said upper basetpiece on the said lower base-piece, a table located upon the upper base-piece, and containing a vertical socket, an upright also'located upon the upper base-piece, and furnished with a sleeve extending over the said.

socket, a centering-pin mounted in the said sleeve, a short centering-pin located in the said socket, an anvil supported upon the said table, and constructed to fit over the said short centering pin, and a liftingdevice mounted in the said table for lifting the said short centering-pin in its socket, substantially as described.

6. In a wheel-cutting fixture for watch-makers lathes, the combination with an upper and a lower base-piece,'the latter being adapted to be attached to a lathe-rest, and the former being movably mounted upon the latter, of means for adjusting the said upper basepiece on the said lower base-piece, a table located upon the. upper base-piece, and containing a vertical socket, an upright also located upon the said upper base-piece, and furnished with a sleeve located in line with the said socket, a centering-pin located in the said sleeve, a short centering-pin located in the said socket, an anvil mounted upon the said table, and containing an elongated slot, and means mounted in the said upright for adjusting the said anvil inward and outward independently of the said base-pieces, substan tially as described.

7. In a wheel-cutting fixture for watch-makers lathes, the combination with an upper and a lower base-piece, the latter being adapted to be attached to a lathe-rest, and the former being movably mounted upon and directly over the latter, and provided upon its upper face with a block upon which the said upper base-piece has sliding bearing, of an table, substantially as described.

20 the head of the said rest, of means for ad-- 8. In a wheel-cutting fixture for watch-makers lathes, the combination with an upper and a lower base-piece, the latter having a recess formed in its lower face, to receive the body of a lathe-rest, and constructed with a long slot opening into its inner end to receive justing the said upper base-piece on the said lower base-piece, a table located upon the upper base-piece, and containing a vertical socket, an upright also located upon the said upper base-piece, and havinga sleeve located in line with the said socket, a centering-pin located in the said sleeve, a short centeringpin located in the said socket, and terminating at its lower end above the lower basepieoe, an anvil mounted upon the said table, and means for adjusting the anvil back and forth, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

JOHN (J. KEBABIAN, J. J. MOFADDEN. 

